Trisazo dyestuff



Patented Oct. 12, 1926.

UNITED STATES PATENT OFFICE.

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um COLOGNE, GERIANY, ABBIGHOB 1'0 GRAB- 01 NEW YORK, N. Y A

CORPORATION OF DELA- Io Drawing. Application flied June I,

by diazotizing a disazo compound containing a 1-2-amino-naphtholether-sulfonic acid as end component and coupling with an aminonaphtholsulfonic acid compound, it was found that the coupling energy of the diazo compound is so reduced that in aqueous alkaline solution no combination with the aminnnaphtholsulfonic acid takes place, but that the diazo compound decomposes readily.

I have now found that if tertiary organic nitrogeneous bases such as pyrirlincs and their derivatives or homnlogues are added to the solution of a diazo compound ob tained by diazotizing the amino group of a disazo compound containing an 1-2-aminonaphtholether-sulfonic acid as end compo nont, the disazo compound becomes not only practically suiliciently stable. but the coupling with an aminonaphtholsulfonic acid compound proceeds rapidly and trisazo dyestufi'sof the general formula ox any R-N=N-R'N= (uHr-N=N MIL-08 are obtained with good yields.

The amount of tertiary base required can be varied considerably without affecting the result described above. It is, however, preferred to use an excess over the amount equivalent to the free acidity of the coupling solution.

This process is 1particularly valuable for the preparation 0 dyestufls in which the components R and R in the above formula. are amines or aminosulfonic acids of the benzene and naphthalene series. the 1-2- aminonaphtholether sulfonic acid the 1-2-6- isomer and I have further found the 2-5-7- aminonaphthol sulfonic acid or its aminol substituted derivatives to be very suitable and components 1926, Serial No. 34,178, and in Germany Jane 18, 1024.

The alkali metal salts a m e d stuffs of the type y n w ye in which R and R represent the radicles of aromatic amines or their sulfonic acids, X an alkyl and Y hydrogen or an aryl radicle, are generally dark powders, soluble in concentrated sulfuric acid with a blue color, soluble in water with from blue to green colors. 13v reduction with stannous chloride and hydrochloric acid they yield an aromatic amino, an aromatic diamine, a 2-6-dmmino-5-naphthol-7-sulfonic acid compound and 1-4-dlamino-naphtholether-G-sulfonic acid.

These new dystufl's dye cotton from blue to green exceedingly bright shades, distinguished bv superior light fastness.

The following example will further illusirate my invention, the parts being by weight:-

25.8 parts aniline 3-6-disulfonic acid dissolved in 300 parts hot water. after cooling and addition of ice and 12 parts mun atic acid (commercial hydrochloric acid), dlazotized at Ill-15 C. This diazo solution is run at 20 G. into a solution of 17.9 parts alpha-naphthylamine hydrochloride in about 500 parts water. The coupling starts immediately and is finished after about 10 hours. The amino-azo solution is now run into 78 parts muriatic acid (commercial hydrochlo' ric acid) and is diazotized by the addition of 6.9 parts sodium nitrite dissolved in parts water. The diazo compound being soluble, is salted out with 250 parts common salt, filtered on a vacuum filter. washed with a saturated sodium chloride solution and added to an ice-cold suspension of 26.7 parts 1-amino-Q-naphtholethylether-S-sulfonic acid in about 300 parts water. The coupling proceeds again readil and the disazo compound separates to a urge extent. 6.5 parts 5 tion followed caustic soda (38 B6.) are now added, which produces clear solution. The solution is now cooled with ice and diazctined by the addition of 7 parts sodium nitrite m 101% eol u- 70 parts muriatac acid (commercial hy rochloric acid}. The diazo compound is now run into a so utlon of 81.5

parts 2-phenylamino-5-naphthol-7-eulonic acid in 60 parts water and 100 parts syridine. After the coupling yeatufl is salted out by the addition of 75 parts common salt, filtered ofi, washed with a saturated sodium' chloride solution and dried. It is in form of its sodium salt a dark powder, soluble in water with Linenish-blue color, soluble in ooncentra eulfuric acid with a blue color. It has in a free state most probably the formula It yields by reduction with stannoua chloride and h drochloric acid aniline-Q-(i-disulionic aci 1-4-naphthylene diamine, 1+ diaminmB-ethoxynaphthalene-G-sulfomc acid and fl-phenylamino-B-amine-li-naphthol-T- eulfonic acid.

It dyes cotton a very clear, greenish-blue shade of superior light fastnees.

Other dyestufis of this same tysieaare aimilarly obtained by 00 bmmg no compounds of aryl-azo-aryl'azo-1-2-ammoneph- 40 The dyestufi from anilineB-B-disulfonic acid 1-naphthylamii1e7-sulfonic acid 1 amino 2 naphtholethylether 6 eulfonic tholether sulfonic acids with 2-5-T-aminonaphtholsulfonic acids in presence of substantial amounts oi tertiary amines, particularl pyridine.

e dyeetufi from aniline-fl-i-disulfonic t lgha naphthylamine 1-2-aminonapht olet ylether-G-sulionic acid 3- 2 phenylamino-fi-nalphtholfi-sulfonic aci dyes cotton reenish b no shades. It can be represente by the formula acid acid 2-phenylamino-5-naphthol-7sulfonic acid having most probably the formula ieflnished the 10 dyes cotton greenish blue shades. naphtholethyletlzer-(i-sulfonic acid 2- The dyestufl from o-toluidine' disulfonic phenylamino-S-naphthol-T-sulfonic acid of 5 acid alphanaphthylamine 1-amino-2- the formula dyes cotton greenish blue shades.

The dyestufl' from dinitrodiphenylamineo-sulfonic acid l-naphth lamine-7sul- 10 fonic acid l-amino-Q-napht olethylether- I claim 1. In processes of producing trisazo dyestufl's containing 1-2-aminonaphtholether-fisulfonic acid as third component and a 2- amino-5-naphthol-7-sulfonic acid compound as end component the steps comprising adding substantial amounts of a pyridine base to the water solution of an aryl-azo-aryl-azo- 1 diazo 2 na htholether 6 sulfonic acid, coupling the drum in this solution with a 2- amino-5naphthol-7-sulfonic acid com ound and recovering the trisazo dyestu produced.

2. In processes of producing trisazo dyestuffs containing 1-2-aminonaphtl1olether-6- fi-sulfonic acid -I- 2-phenylamino-5-naphthol-7-sulfonic acid, dyeing cotton bluish green shades, has most probably the formula N BChH the steps comprising coupling 3-6-disulfobenzene 1-azo-4-naphthalene-l-azo 4-naphthalene-1-diazo 2-ethoxy-6-sulfonic acid with phenylamino-5-naphthol-'(-sulfonic acid In presence of substantial amounts of gyridlne.

4. As new products trisazo dyestu s of the general formula napt o1 sulfonic acid compound.

5. As new products trisazo dyestuffs of the general formula in which R and R are the radicles of arcinatic amines or aminosulfonic acids, X an alkyl and Y hydrogen or an aryl radicle, which dyestuffs are in form of their alkali metal salts dark powders soluble in water which in form of its alkali metal salt is a dark powder, soluble in water with a greenish blue color, soluble in concentrated sulfuric acid with a blue color, dyeing cotton exceedingly bright and fast shades and "elding by reduction with stannous ch oride 85 and hydrochloric acid aniline-li-fi-disulfonic with from blue, to green colors, soluble in 6. As new products triasazo dyestufis of g the general formula in which R and R are the radicles of arcmatic amines or amino sulfonic acid, .X an alkyl and Y hydrogen or an a l radicle, which dyestuffs are in form of t eir alkali metal salts dark powders soluble in water with from blue to reen colors, soluble in concentrncted sulfuric acid with blue color, dyeing cotton from blue to con exceedingly bri ht shades of superior light fastness and yiefiiing by reduction with stannous chloride and hydrochloric acid an aromatic amine, an aromatic diamine, a 1-4-diamino- 2-naphtholethen6sulfonic acid and a 2-6- diamino-5-naphthol-7- sulfonic acid compound.

7. As a new product the trisazo dyestuif having the formula my hand.

HUGO SCHWEITZER.

lone-1-diazo-2-ethoxy-6-sulfonic acid with phenylamino-5-naphtho1-T-sulfonic acid in presenceof substantial amounts of gyrldlne.

4. As new products trisazo dyestu s of the in which R and R are the radicles of aromatic amines or amino sulfonic acids, an alkyl and Y ltiiydrogen or an aryl radicle, which dyestu s are in form of their alkali metal salts dark powders, soluble in water with from blue to green colors, soluble .in concentrated sulfuric acid with blue color, dyein cotton exceedingly bright green to blue sha es of superior light fastness and yielding by reduction with stannous chloride and hydrochloric acid an aromatic amine, an aromatic diamine, a 1-4-diamino- 2-na htholether-sulfonic acid and a diaminonapt ol sulfonie acid compound. 5. As new products trisazo dyestuffs of the general formula in which R and R are the radicles of aromatic amines or aminosulfonic acids, X an alkyl and Y hydrogen or an'aryl radicle, which dyestufi's are in form of their alkali metal salts dark powders soluble in water NKY in which 'R and R are the radicles of aromatic amines or amino sulfonic acid, X an alkyl and Y hydrogen or an arid radicle, which dyestulfs are in form of t eir alkali metal salts dark powders soluble in water with from blue to reen colors, soluble in concentracted sulfuric acid with blue color,

dyeing cotton from blue to een exceedingly bri ht shades of superior light fastness and yie ding by reduction with stannous chloride and hydrochloric acid an aromatic amine, an aromatic diamine, a 1-4-diamino- 2-naphtholether-6-sulfonic acid and a 2-6- diamino-5-naphthol-7;sulfonic .acid compound.

7. As a new productthe trisazo dyestuif having the formula acid, 1-4-naphthylene-diamine, 1-4-diamino- 2-naphtholethylether-fi-sulfonic acid and 6- amino -2-phenylamino-5-naphthol-7-sulfonic aci In testimony whereof I have hereunto set HUGO SOHWEITZER.

'my hand.

Certificate of Correction.

n is hereby 1926, many 8 certified that in Letters Patent No. 1,602,991, granted October 12,

upon the application of Hugo Schweitzer, of Wiesdorf, near Cologne, 'Geror an improvement in Trisazo Dyestufi's, an error e cation requiring correction as followsz'Page 3, line 3 afpears in the rinted ,claim 2, strike out, and that the said Let ters atent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 9th day of November, A. D, 1926.

' [snarl WM. A. Kimmie Acting Commissioner of Patents;

Certificate of Correction.

It is hereby certified that in Lem-w Intvni No. LUHZHQL granted October 12 1926, upon the application of Hu o Swhw-nzvr, ol \Yiusdorf, near Cologne, Ger many, for an improvement in Trisnzo I) \estufl's, an error appears in the printed s clfication rm uirin correction as follows: Fame 3 line 3% ('laim 2. strike out I: h l V the phrase amino-5-naphtholfi-sull'onic arid compound and that the said Letters Patent should be read with this correct ion thvrein that the same may conform to the record of the case in the Patent ()llice.

Signed and sealed thls 9th day of November, A. D 1926.

[SEAL] WM. A. KINNAN,

Acting ommissioner of Patents. 

